A distributed system for 3D anatomical structures visualization and surgical planning

The purpose of this research is to fabricate maxillofacial biomodel and apply the rapid prototyping technology using Fused Deposition Modeling (FDM) in solving some surgical problem in medical field. The build biomodel will be used in educational and pre-medical surgical environments. Besides, it can simplify the complex surgical procedures and the visualization of anatomical structures. A machine that works under FDM principle will be used to produce a finished biomodel. Product analysis later is implemented to make the result more trustful. Thus, it is demonstrated that biomodel can help surgical planning and at the same time it will reduce costs, surgical times and infection risks in health care system.

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Three-dimensional magnetic resonance reconstruction images before and after surgical therapy of spontaneous canine brain tumors

Ciência Rural ◽

10.1590/s0103-84782007000400044 ◽

2007 ◽

Vol 37 (4) ◽

pp. 1174-1177

Author(s):

Julio Carlos Canola ◽

Fabrício Singaretti de Oliveira

Keyword(s):

Brain Tumor ◽

Magnetic Resonance ◽

Surgical Planning ◽

Tumor Volume ◽

Three Dimensional ◽

Treatment Monitoring ◽

Magnetic Resonance Images ◽

Intracranial Tumor ◽

Anatomical Structures ◽

Before And After

Specific software was used for reconstruction of spontaneous intracranial tumor volume from magnetic resonance images (MRI) in three dogs. Histopathologically confirmed meningioma, cystic meningioma, and choroid plexus tumors were evaluated before and after surgery. The software allowed the whole-volume segmentation of the skin, brain, tumor, edema, and cyst. Manipulation of the three-dimensional images (3D) allowed visualization of all anatomical structures, aided clinical understanding, surgical planning, and treatment monitoring.

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Cone Beam CT in Diagnosis and Surgical Planning of Dentigerous Cyst

Case Reports in Dentistry ◽

10.1155/2017/7956041 ◽

2017 ◽

Vol 2017 ◽

pp. 1-6

Author(s):

Naira Figueiredo Deana ◽

Nilton Alves

Keyword(s):

Surgical Planning ◽

Preoperative Planning ◽

Panoramic Radiography ◽

Cone Beam Ct ◽

Dentigerous Cyst ◽

The Body ◽

Cone Beam ◽

Routine Method ◽

Anatomical Structures ◽

Surgical Treatment Planning

Diagnosis and preoperative planning are critical in the execution of any surgical procedure. Panoramic radiography is a routine method used in dentistry to assist clinical diagnosis; however, with this technique 3D anatomical structures are compressed into 2D images, resulting in overlapping of structures which are of interest in the diagnosis. In this study we report the case of a patient who presented with a dentigerous cyst of expressive dimensions in the body of the mandible region. The surgery was planned and executed after observing the margins of the lesion by Cone Beam Computed Tomography (CBCT). We conclude that CBCT is a precise method to help diagnosis; it provides greater accuracy in surgical treatment planning through 3D image display, allowing more effective results.

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Cerebral Anatomy Detection and Surgical Planning in Patients with Anterior Skull Base Meningiomas Using a Virtual Reality Technique

Journal of Clinical Medicine ◽

10.3390/jcm10040681 ◽

2021 ◽

Vol 10 (4) ◽

pp. 681

Author(s):

Samer Zawy Alsofy ◽

Makoto Nakamura ◽

Ayman Suleiman ◽

Ioanna Sakellaropoulou ◽

Heinz Welzel Saravia ◽

...

Keyword(s):

Virtual Reality ◽

Skull Base ◽

Surgical Planning ◽

Three Dimensional ◽

Anterior Skull Base ◽

Anatomical Structures ◽

Related Data ◽

Head Positioning ◽

Mri Scans ◽

Skull Base Meningiomas

Anterior skull base meningiomas represent a wide cohort of tumors with different locations, extensions, configurations, and anatomical relationships. Diagnosis of these tumors and review of their therapies are inseparably connected with cranial imaging. We analyzed the influence of three-dimensional-virtual reality (3D-VR) reconstructions versus conventional computed tomography (CT) and magnetic resonance imaging (MRI) images (two-dimensional (2D) and screen 3D) on the identification of anatomical structures and on the surgical planning in patients with anterior skull base meningiomas. Medical files were retrospectively analyzed regarding patient- and disease-related data. Preoperative 2D-CT and 2D-MRI scans were retrospectively reconstructed to 3D-VR images and visualized via VR software to detect the characteristics of tumors. A questionnaire of experienced neurosurgeons evaluated the influence of the VR visualization technique on identification of tumor morphology and relevant anatomy and on surgical strategy. Thirty patients were included and 600 answer sheets were evaluated. The 3D-VR modality significantly influenced the detection of tumor-related anatomical structures (p = 0.002), recommended head positioning (p = 0.005), and surgical approach (p = 0.03). Therefore, the reconstruction of conventional preoperative 2D scans into 3D images and the spatial and anatomical presentation in VR models enabled greater understanding of anatomy and pathology, and thus influenced operation planning and strategy.

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Segmentation procedures for the assessment of paranasal sinuses volumes

The Neuroradiology Journal ◽

10.1177/1971400920946635 ◽

2020 ◽

pp. 197140092094663

Author(s):

Michaela Cellina ◽

Daniele Gibelli ◽

Annalisa Cappella ◽

Tahereh Toluian ◽

Carlo Valenti Pittino ◽

...

Keyword(s):

Paranasal Sinuses ◽

Surgical Planning ◽

Human Subjects ◽

Adult Population ◽

Standard Technique ◽

Volumetric Analysis ◽

Ethmoid Sinus ◽

Inclusion Criteria ◽

Anatomical Structures ◽

Shape Data

Background The paranasal sinuses are complex anatomical structures, characterised by highly variable shape, morphology and size. With the introduction of multidetector scanners and the development of many post-processing possibilities, computed tomography became the gold standard technique to image the paranasal sinuses. Segmentation allows the extraction of metrical and shape data of these anatomical components that can be applied for diagnostic, education, surgical planning and simulation, and to plan minimally invasive interventions in otorhinolaryngology and neurosurgery. Discussion Our aim was to provide a review of the existing literature on segmentation, its types and application, and the data obtained from this procedure. The literature search was conducted on PubMed (including Medline), ScienceDirect and Google Scholar databases, using the keywords as follows: ‘paranasal sinuses’, ‘frontal sinus’, ‘maxillary sinus’, ‘sphenoid sinus’, ‘ethmoid sinus’, in all possible combinations with the keywords ‘segmentation’ and ‘volumetric analysis’. Inclusion criteria were: articles written in English, on living human subjects, on the adult population and focused on paranasal sinuses analysis. Conclusion This article provides an overview of the types and main application of segmentation procedures on paranasal sinuses, and the results provided by the studies on this topic.

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Fundamentals of Stereolithography, an Useful Tool for Diagnosis in Dentistry

Odovtos - International Journal of Dental Sciences ◽

10.15517/ijds.v17i2.20730 ◽

2015 ◽

Vol 17 (2) ◽

pp. 15 ◽

Cited By ~ 1

Author(s):

Ma. del Socorro Islas Ruiz DDS ◽

Miguel Ángel Loyola Frías DDS ◽

Ricardo Martínez Rider DDS ◽

Amaury Pozos Guillén DDS, PhD ◽

Arturo Garrocho Rangel DDS, PhD

Keyword(s):

Surgical Planning ◽

Three Dimensional ◽

Dental Students ◽

X Rays ◽

Craniofacial Anomalies ◽

Essential Information ◽

Anatomical Structures ◽

Implant Placement ◽

General Dentists ◽

Stereolithographic Models

Advancements in digital technology and imaging over the last 25 years have permitted the implementation of three-dimensional (3D) modeling protocols in Dentistry. The use of stereolithographic models has progressively replaced traditional milled models and x-rays in the management of craniofacial anomalies and in implant rehabilitation. Diverse advantages can be mentioned, including better visualization of complex anatomical structures and more precise and sophisticated pre-surgical planning, through a simulated insight of the procedures of interest. The aim of this review is to provide essential information about the different applications and limitations of stereolithography, addressed to those general dentists and dental students interested in gaining experience in the reconstructive surgery and implant placement fields.

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Advanced hepatic vasculobiliary imaging segmentation and 3D reconstruction as an aid in the surgical management of high biliary stenosis

BMC Medical Imaging ◽

10.1186/s12880-020-00520-0 ◽

2020 ◽

Vol 20 (1) ◽

Author(s):

Nuno Pereira da Silva ◽

Inês Abreu ◽

Marco Serôdio ◽

Luís Ferreira ◽

Henrique Alexandrino ◽

...

Keyword(s):

3D Reconstruction ◽

Surgical Planning ◽

3D Model ◽

Imaging Techniques ◽

Three Dimensional ◽

3D Models ◽

Anatomical Landmarks ◽

Biliary Stenosis ◽

Anatomical Structures ◽

Ct And Mri

Abstract Background Three-dimensional (3D) models are increasingly used to help surgeons, guiding them through the complex hepatic vasculobiliary anatomy. The biliary tract is a relatively untapped territory with only a few case reports described in medical literature. Our aim is to present an innovative 3D reconstruction methodology for biliary imaging and surgical planning, applied to a case of iatrogenic biliary stricture, with fusion of segmented CT and MRI images. Case presentation A selected case of Bismuth type III iatrogenic biliary stenosis for 3D planning. CT and MR studies were acquired with dedicated protocols for segmentation. Two radiologists performed segmentation and 3D model post-processing, fusing both imaging techniques to faithfully render the anatomical structures. Measurements of anatomical landmarks were taken in both the CT/MRI and the 3D model to assure its accuracy and differences in measurement were calculated. The 3D model replicates anatomical structures and pathology with high accuracy, with only 2.2% variation between STL, CT and MRI measurements. The model was discussed with the surgical team and used in the surgical planning, improving confidence in this delicate procedure, due to the detailed prior knowledge of the patient's anatomy. Conclusion Three-dimensional reconstructions are a rapidly growing area of research with a significant impact in the personalized and precision medicine. The construction of 3D models that combine vascular and biliary anatomy, using different imaging techniques, respectively CT and MRI, will predictably contribute to a more rigorous planning of complex liver surgeries.

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A simplified fascial model of pelvic anatomical surgery: going beyond parametrium-centered surgical anatomy

Anatomical Science International ◽

10.1007/s12565-020-00553-z ◽

2020 ◽

Cited By ~ 1

Author(s):

Stefano Cosma ◽

Domenico Ferraioli ◽

Marco Mitidieri ◽

Marcello Ceccaroni ◽

Paolo Zola ◽

...

Keyword(s):

Surgical Planning ◽

Umbilical Artery ◽

Holistic Approach ◽

Surgical Anatomy ◽

Female Pelvis ◽

Anatomical Structures ◽

Anatomical Knowledge ◽

Fresh Frozen ◽

And Training ◽

Anatomical Area

Abstract The classical surgical anatomy of the female pelvis is limited by its gynecological oncological focus on the parametrium and burdened by its modeling based on personal techniques of different surgeons. However, surgical treatment of pelvic diseases, spreading beyond the anatomical area of origin, requires extra-regional procedures and a thorough pelvic anatomical knowledge. This study evaluated the feasibility of a comprehensive and simplified model of pelvic retroperitoneal compartmentalization, based on anatomical rather than surgical anatomical structures. Such a model aims at providing an easier, holistic approach useful for clinical, surgical and educational purposes. Six fresh-frozen female pelves were macroscopically and systematically dissected. Three superficial structures, i.e., the obliterated umbilical artery, the ureter and the sacrouterine ligament, were identified as the landmarks of 3 deeper fascial-ligamentous structures, i.e., the umbilicovesical fascia, the urogenital-hypogastric fascia and the sacropubic ligament. The retroperitoneal areolar tissue was then gently teased away, exposing the compartments delimited by these deep fascial structures. Four compartments were identified as a result of the intrapelvic development of the umbilicovesical fascia along the obliterated umbilical artery, the urogenital-hypogastric fascia along the mesoureter and the sacropubic ligaments. The retroperitoneal compartments were named: parietal, laterally to the umbilicovesical fascia; vascular, between the two fasciae; neural, medially to the urogenital-hypogastric fascia and visceral between the sacropubic ligaments. The study provides the scientific rational for a model of pelvic retroperitoneal anatomy based on identifiable anatomical structures and suitable for surgical planning and training.

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Selection and Preparation of Specific Tissue Regions For Tem Using Large Epoxy-Embedded Blocks

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010007206x ◽

1973 ◽

Vol 31 ◽

pp. 324-325 ◽

Cited By ~ 1

Author(s):

P. M. Lowrie ◽

W. S. Tyler

Keyword(s):

Electron Microscopy ◽

Anatomical Structures ◽

Ultrastructural Studies ◽

Transmission Electron ◽

Microscopic Evaluation ◽

Embedded Blocks ◽

Specific Tissue ◽

Definition Of ◽

Areas Of Interest ◽

Selection Of

The importance of examining stained 1 to 2μ plastic sections by light microscopy has long been recognized, both for increased definition of many histologic features and for selection of specimen samples to be used in ultrastructural studies. Selection of specimens with specific orien ation relative to anatomical structures becomes of critical importance in ultrastructural investigations of organs such as the lung. The uantity of blocks necessary to locate special areas of interest by random sampling is large, however, and the method is lacking in precision. Several methods have been described for selection of specific areas for electron microscopy using light microscopic evaluation of paraffin, epoxy-infiltrated, or epoxy-embedded large blocks from which thick sections were cut. Selected areas from these thick sections were subsequently removed and re-embedded or attached to blank precasted blocks and resectioned for transmission electron microscopy (TEM).

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